WO2014133009A1 - Batterie de stockage, procédé de contrôle de batterie de stockage, dispositif de contrôle et procédé de contrôle - Google Patents

Batterie de stockage, procédé de contrôle de batterie de stockage, dispositif de contrôle et procédé de contrôle Download PDF

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Publication number
WO2014133009A1
WO2014133009A1 PCT/JP2014/054701 JP2014054701W WO2014133009A1 WO 2014133009 A1 WO2014133009 A1 WO 2014133009A1 JP 2014054701 W JP2014054701 W JP 2014054701W WO 2014133009 A1 WO2014133009 A1 WO 2014133009A1
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Prior art keywords
power storage
storage means
soc
temperature
charge
Prior art date
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PCT/JP2014/054701
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English (en)
Japanese (ja)
Inventor
高治 松永
梶谷　浩司
克也 小野瀬
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日本電気株式会社
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Application filed by 日本電気株式会社 filed Critical 日本電気株式会社
Priority to US14/770,514 priority Critical patent/US9774062B2/en
Priority to JP2015502956A priority patent/JP6041040B2/ja
Publication of WO2014133009A1 publication Critical patent/WO2014133009A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H01M10/443—Methods for charging or discharging in response to temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/46—Accumulators structurally combined with charging apparatus
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0069—Charging or discharging for charge maintenance, battery initiation or rejuvenation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/342—The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a storage battery, a storage battery control method, a control device, and a control method.
  • Storage batteries such as lithium ion secondary batteries and lead storage batteries are prone to battery capacity deterioration when placed in a harsh temperature environment in a charged state.
  • the battery capacity is significantly deteriorated in a fully charged state where the SOC (state of charge) is 100% (see FIGS. 7 and 8).
  • the storage battery is preferably used in a non-harsh temperature environment (normal temperature environment) of, for example, about ⁇ 10 ° C. to 50 ° C.
  • Patent Document 1 discloses a power supply device including a secondary battery and a capacitor connected in parallel to the secondary battery.
  • the power supply device includes: a detection unit that detects a temperature of the capacitor and a voltage of the capacitor; a switching element that limits a discharge current from the capacitor based on a detection value of the detection unit; and a detection value to the capacitor based on the detection value of the detection unit. And a switching element that performs at least one of limiting and cutting off the charging current.
  • the power supply device disconnects the capacitor when the temperature of the capacitor is equal to or higher than a preset temperature threshold (the lower limit of the temperature determined to be abnormal). By such control, temperature information and deterioration of the capacitor are suppressed.
  • Patent Document 2 discloses a battery pack that can reduce the risk of deterioration due to charging of a secondary battery at a temperature that is not suitable for charging, regardless of whether the temperature of the secondary battery is low or high.
  • the battery pack includes a secondary battery, a connection terminal for receiving a charging current output from a charging unit that outputs a charging current for charging the secondary battery, and a temperature detection for detecting a temperature of the secondary battery. And the temperature of the secondary battery detected by the temperature detection unit is received by the connection terminal when the second temperature is different from the first temperature preset as a temperature suitable for charging the secondary battery.
  • a charging voltage controller configured to lower a charging voltage of the secondary battery based on the current from a first voltage set in advance as a voltage for charging the secondary battery at a constant voltage.
  • Storage batteries may be used in harsh temperature environments. For this reason, the technique which suppresses battery capacity degradation when a storage battery is used under a severe temperature environment is desired.
  • the inventor completes (stops) charging at a lower SOC level than when used under a normal temperature environment, and the SOC is 100%.
  • the means of not charging until fully charged As described above, the battery capacity deterioration in the fully charged state where the SOC is 100% is remarkable (see FIG. 7). According to the technique, the degree of deterioration can be reduced.
  • SOC a predetermined level
  • the use in a severe temperature environment with a low SOC level when stopping charging is faster.
  • inconveniences such as replacement with a new storage battery may occur although it is still usable.
  • This invention makes it a subject to provide the new technique which suppresses battery capacity degradation which generate
  • First power storage means Second power storage means connected in parallel with the first power storage means; Temperature measuring means for measuring the temperature; Charge / discharge control means for controlling charge / discharge of the first power storage means and the second power storage means; Have The charge / discharge control means calculates SOC (state of charge) of the first power storage means and the second power storage means in a charge completion state that does not allow further charging according to the measurement result by the temperature measurement means. And when increasing the SOC of the first power storage means, increasing the SOC of the second power storage means, and increasing the SOC of the first power storage means. A storage battery that reduces the SOC of the storage means is provided.
  • First power storage means To storage battery, First power storage means; Second power storage means connected in parallel with the first power storage means; Temperature measuring means for measuring the temperature; With The SOC of the first power storage means and the second power storage means in a charging completion state that does not allow further charging is changed according to the measurement result by the temperature measuring means, and the first power storage means
  • First power storage means First power storage means; Second power storage means connected in parallel with the first power storage means; Temperature measuring means for measuring the temperature; Charge / discharge control means for controlling charge / discharge of the storage battery having The charge / discharge control means changes the SOC of the first power storage means and the second power storage means in a charge completion state that does not allow further charging according to the measurement result by the temperature measurement means, and When decreasing the SOC of the first power storage means, the SOC of the second power storage means is increased, and when increasing the SOC of the first power storage means, the SOC of the second power storage means.
  • First power storage means Second power storage means connected in parallel with the first power storage means; Temperature measuring means for measuring the temperature; Having a step of controlling charging and discharging of the storage battery having In the step, the SOCs of the first power storage unit and the second power storage unit in a charging completion state in which no further charging is permitted are changed according to the measurement result by the temperature measurement unit, and the first When reducing the SOC of the second power storage means, the SOC of the second power storage means is increased, and when increasing the SOC of the first power storage means, the SOC of the second power storage means is decreased.
  • a control method is provided.
  • the storage battery control method and the operation subject may be a computer.
  • the storage battery of this embodiment includes a CPU, a memory, and a program loaded in the memory of an arbitrary computer (a program stored in the memory from the stage of shipping the device in advance, a storage medium such as a CD, and the Internet). And a storage unit such as a hard disk for storing the program, and a network connection interface, and any combination of hardware and software. It will be understood by those skilled in the art that there are various modifications to the implementation method and apparatus.
  • FIG. 1 shows an example of a functional block diagram of the storage battery 1 of the present embodiment.
  • the storage battery 1 includes a power storage unit (first power storage unit) 10, an auxiliary power storage unit (second power storage unit) 11, a temperature measurement unit 13, and a charge / discharge control unit 14.
  • first power storage unit 10
  • second power storage unit 11
  • temperature measurement unit 13 13
  • charge / discharge control unit 14 14
  • the power storage unit 10 includes one or a plurality of battery cells.
  • the plurality of battery cells constituting the power storage unit 10 are connected in series and / or in parallel.
  • the electrical storage part 10 can be comprised with a lithium ion secondary battery or a lead acid battery, for example.
  • the auxiliary power storage unit 11 is composed of one or a plurality of battery cells, and is connected in parallel with the power storage unit 10.
  • the plurality of battery cells constituting the auxiliary power storage unit 11 are connected in series and / or in parallel.
  • the auxiliary power storage unit 11 may be, for example, a lithium ion secondary battery or a lead storage battery, or may be a capacitor (such as an electric double layer capacitor).
  • the configuration (type of battery, cell connection method, capacity) of power storage unit 10 and auxiliary power storage unit 11 may be the same or different.
  • the capacity of the auxiliary power storage unit 11 may be equal to or less than the capacity of the power storage unit 10.
  • the roles of the power storage unit 10 and the auxiliary power storage unit 11 will be described.
  • charging / discharging of the storage battery 1 of this embodiment is implement
  • the power storage unit 10 composed of a lithium ion secondary battery or a lead storage battery has low temperature resistance, and the above-described problem of battery capacity deterioration may occur.
  • the power storage unit 10 of the present embodiment is controlled by the charge / discharge control unit 14 described below, and the SOC in the charge completion state (hereinafter, “charge completion SOC”) changes according to the temperature environment. Specifically, the SOC when the charge is completed in a severe temperature environment (eg, ⁇ 10 ° C. or less or 50 ° C. or more) is in a normal temperature environment (eg, greater than ⁇ 10 ° C. and less than 50 ° C.). It becomes smaller than the charge completion SOC in the case of With such a configuration, deterioration of the power storage unit 10 when the storage battery 1 is used under a severe temperature environment is suppressed.
  • a severe temperature environment eg, ⁇ 10 ° C. or less or 50 ° C. or more
  • a normal temperature environment eg, greater than ⁇ 10 ° C. and less than 50 ° C.
  • the charging completion state is a state in which no further charging is allowed (not performed) for any of the power storage unit 10 and the auxiliary power storage unit 11, and a state in which the user recognizes that the charging rate is 100%. is there.
  • the amount of charge in the charged state (the sum of the charge amount of the power storage unit 10 and the charge amount of the auxiliary power storage unit 11) is smaller than the sum of the capacity of the power storage unit 10 and the capacity of the auxiliary power storage unit 11. That is, in the charging completion state, both the SOC of power storage unit 10 and the SOC of auxiliary power storage unit 11 do not become 100%.
  • the charging completion SOC of the power storage unit 10 is reduced, the charging completion SOC of the auxiliary power storage unit 11 is increased accordingly. Further, when the charging completion SOC of the power storage unit 10 is increased, the charging completion SOC of the auxiliary power storage unit 11 is decreased accordingly.
  • the amount of power corresponding to the change in the charge completion SOC of the power storage unit 10 and the amount of power corresponding to the change in the charge completion SOC of the auxiliary power storage unit 11 can be substantially matched. In such a case, regardless of the temperature environment, the sum of the charge amount of the power storage unit 10 and the charge amount of the auxiliary power storage unit 11 in the charging completion state can be made substantially constant. As a result, the above problems can be avoided.
  • the temperature measuring unit 13 measures the temperature of the environment where the power storage unit 10 is placed. For example, the temperature measurement unit 13 measures the temperature around the power storage unit 10.
  • the charge / discharge control unit 14 controls charging / discharging of the power storage unit 10 and the auxiliary power storage unit 11. In other words, the charge / discharge control unit 14 charges each of the power storage unit 10 and the auxiliary power storage unit 11 with a predetermined charge completion SOC as an upper limit, and discharges the power charged in the power storage unit 10 and the auxiliary power storage unit 11. .
  • the charge / discharge control unit 14 may store power during charging.
  • the SOC of each of the unit 10 and the auxiliary power storage unit 11 may be configured to be measurable.
  • the means for measuring the SOC is not particularly limited, and any conventional technique can be adopted. Then, the charging of each of the power storage unit 10 and the auxiliary power storage unit 11 is completed (stopped) by comparing the measured SOC with the charge completion SOC set in each of the power storage unit 10 and the auxiliary power storage unit 11 at that time. Timing may be determined.
  • the charge / discharge control unit 14 changes the charge completion SOC of the power storage unit 10 and the auxiliary power storage unit 11 in the charge completion state according to the measurement result by the temperature measurement unit 13.
  • the charge / discharge control unit 14 also increases the charge completion SOC of the auxiliary power storage unit 11. Further, when the charge completion SOC of power storage unit 10 is increased, the charge completion SOC of auxiliary power storage unit 11 is also reduced.
  • the charge / discharge control unit 14 may be operated in a severe temperature environment (eg, ⁇ 10) from a range where the measurement result by the temperature measurement unit 13 is within a normal temperature environment (eg, greater than ⁇ 10 ° C. and less than 50 ° C.) And within the range of less than 50 ° C. or more than 50 ° C.) the charge completion SOC of the power storage unit 10 is made smaller than the previous charge completion SOC (eg, 100% ⁇ 90%, 95% ⁇ 90%) and auxiliary The charge completion SOC of the power storage unit 11 is made larger than the charge completion SOC so far (eg, 0% ⁇ 100%, 0% ⁇ 50%, 10% ⁇ 50%).
  • the charge / discharge control unit 14 operates in a normal temperature environment (eg, from ⁇ 10 ° C.) within a range where the measurement result by the temperature measurement unit 13 is severe (eg, ⁇ 10 ° C. or less or 50 ° C. or more). If it is within the range of large and smaller than 50 ° C., the charge completion SOC of the power storage unit 10 is made larger than the charge completion SOC so far (eg, 90% ⁇ 100%, 90% ⁇ 95%) and auxiliary The charging completion SOC of the power storage unit 11 is made smaller than the charging completion SOC so far (eg, 100% ⁇ 0%, 50% ⁇ 0%, 50% ⁇ 5%).
  • the charge / discharge control unit 14 holds information that associates the value of the charge completion SOC of the power storage unit 10 and the value of the charge completion SOC of the auxiliary power storage unit 11 for each predetermined temperature range. You may control charge completion SOC using information. It should be noted that the amount of power corresponding to the change in the charge completion SOC of power storage unit 10 and the amount of power corresponding to the change in the charge completion SOC of auxiliary power storage unit 11 can be set to match.
  • the charge completion SOC of the auxiliary power storage unit 11 is relatively high (90% , 100%, etc.), it is preferable to configure the auxiliary power storage unit 11 with a capacitor having a relatively high temperature resistance.
  • the auxiliary power storage unit 11 is composed of a lithium ion secondary battery or a lead storage battery having a relatively low temperature resistance, the capacity of the auxiliary power storage unit 11 is sufficiently increased so as to be in a severe temperature environment (eg, ⁇ 10 ° C.). It is preferable to prevent the SOC of the auxiliary power storage unit 11 from becoming too large at the following or 50 ° C. or higher). By comprising in this way, degradation of the auxiliary
  • the charge completion SOC of the power storage unit 10 and the auxiliary power storage unit 11 can be changed according to the usage environment of the storage battery. Specifically, when the charging completion SOC of the power storage unit 10 is decreased, the charging completion SOC of the auxiliary power storage unit 11 is increased, and when the charging completion SOC of the power storage unit 10 is increased, the charging completion SOC of the auxiliary power storage unit 11 is increased. Can be small.
  • the storage battery 1 of this embodiment when used in a severe temperature environment (eg, ⁇ 10 ° C. or lower or 50 ° C. or higher), a lithium ion secondary battery or a lead storage battery with low temperature resistance is used. Charging completion SOC of power storage unit 10 configured can be reduced. That is, it is possible to avoid the SOC of the power storage unit 10 from becoming 100% and set it to a small value. As a result, deterioration of the power storage unit 10 can be suppressed.
  • a severe temperature environment eg, ⁇ 10 ° C. or lower or 50 ° C. or higher
  • Charging completion SOC of power storage unit 10 configured can be reduced. That is, it is possible to avoid the SOC of the power storage unit 10 from becoming 100% and set it to a small value. As a result, deterioration of the power storage unit 10 can be suppressed.
  • the capacity of the auxiliary power storage unit 11 can be made smaller than that of the power storage unit 10.
  • the auxiliary power storage unit 11 can be configured with, for example, a capacitor having high temperature resistance.
  • the auxiliary power storage unit 11 is a lithium ion secondary battery having a capacity such that the charge completion SOC does not become 100% when used in a severe temperature environment (eg, ⁇ 10 ° C. or lower or 50 ° C. or higher). It can be composed of a lead storage battery.
  • the capacity of the auxiliary power storage unit 11 can be made relatively small, it is possible to avoid an excessive increase in the capacity of the auxiliary power storage unit 11 even if such requirements are satisfied.
  • the charging completion SOC of the power storage unit 10 when the charging completion SOC of the power storage unit 10 is reduced, the charging completion SOC of the auxiliary power storage unit 11 is increased, and the reduced power is charged in the auxiliary power storage unit 11. Can do. Further, when the charge completion SOC of the power storage unit 10 is increased, the charge completion SOC of the auxiliary power storage unit 11 can be reduced, and the increased power can be reduced from the charge amount of the auxiliary power storage unit 11. For this reason, even if the charge completion SOC of the power storage unit 10 becomes small due to the temperature environment, the charge amount of the storage battery 1 as a whole can be kept almost constant without changing.
  • the present embodiment is an embodiment in which the storage battery 1 of the first embodiment is more specific.
  • FIG. 2 an example of a structure of the storage battery 1 of this embodiment is shown.
  • the storage battery 1 includes a power storage unit 10, an auxiliary power storage unit 11, a switch 12, a temperature measurement unit 13, a charge / discharge control unit (control circuit) 14, a balance circuit 15, a switch 16, And a switch 17.
  • the storage battery 1 is connected to a charger 18 via an external connection terminal for charging / discharging.
  • the power storage unit 10 has a configuration in which a plurality of lithium ion secondary battery cells are connected in series.
  • the energy density of the power storage unit 10 can be set to, for example, 100 Wh / kg or more.
  • the auxiliary power storage unit 11 has a configuration in which a plurality of capacitor cells (such as electric double layer capacitor cells) are connected in series.
  • the energy density of the auxiliary power storage unit 11 is, for example, 10 Wh / kg or more.
  • the power storage unit 10 and the auxiliary power storage unit 11 are connected in parallel.
  • the temperature measurement unit 13 has the same number of temperature sensors as the number of the plurality of lithium ion secondary battery cells constituting the power storage unit 10, and is configured to measure the temperature (ambient temperature) of each lithium ion secondary battery cell. Has been.
  • the temperature sensor is installed closer to the auxiliary power storage unit 11 than the power storage unit 10, but the installation position of the temperature sensor is not particularly limited, and the temperature of the power storage unit 10 (ambient temperature). Can be measured.
  • the temperature measurement part 13 may be comprised with one temperature sensor, and may be comprised with the number of temperature sensors which do not correspond with the number of lithium ion secondary battery cells.
  • the balance circuit 15 is used to reduce a difference in charge amount between a plurality of lithium ion secondary battery cells. Such a balance circuit 15 can be realized according to the prior art.
  • the charge / discharge control unit 14 acquires a measurement result from the temperature measurement unit 13 and controls on / off of the switch 12 during charge / discharge according to the result. Further, the charge / discharge control unit 14 controls on / off of the switch 16 for switching the connection between the balance circuit 15 and the power storage unit 10. Further, the charge / discharge control unit 14 controls on / off of the switch 17 for switching connection between the charger 18 and the power storage unit 10 and the auxiliary power storage unit 11.
  • the storage battery 1 of the present embodiment has a 100% charge completion SOC of the power storage unit 10 when used in a normal temperature environment (first temperature range, eg, greater than ⁇ 10 ° C. and less than 50 ° C.),
  • the SOC of the auxiliary power storage unit 11 is set to 0%, and the SOC of the power storage unit 10 when used in a severe temperature environment (second temperature range, eg, ⁇ 10 ° C. or lower or 50 ° C. or higher)
  • P% (0 ⁇ P ⁇ 100, a design matter
  • the SOC of the auxiliary power storage unit 11 is 100%. That is, the charge completion SOC of power storage unit 10 in a normal temperature environment (first temperature range) is the charge completion SOC of power storage unit 10 in a severe temperature environment (second temperature range). Bigger than.
  • the charge / discharge control unit 14 acquires measurement results from the temperature measurement unit 13 continuously (eg, every predetermined time, every predetermined timing), and the measurement results (temperature) are in a normal temperature environment (first temperature range). ) Or monitoring whether the temperature environment has changed between them, and monitoring whether the temperature environment is within the range (second temperature range) .
  • the charge / discharge control unit 14 sets the set value of the charge completion SOC of the power storage unit 10 to a state suitable for the temperature environment.
  • the charging completion SOC of power storage unit 10 is set to 100%.
  • the charge / discharge control unit 14 turns off the switch 12 to turn off the connection between the auxiliary power storage unit 11 and the charge / discharge external connection terminal (terminal connected to the charger 18). Charge and discharge using only. That is, only the power storage unit 10 is charged when charging the power, and the power is taken out only from the power storage unit 10 when discharging the power.
  • the charge / discharge control unit 14 continuously obtains the measurement result from the temperature measurement unit 13 (for example, every predetermined time and every predetermined timing) (S10), and the measurement result (temperature) is in a normal temperature environment. (First temperature range) or whether it is within a severe temperature environment (second temperature range), whether the temperature environment has changed between them Monitoring is continued (S20).
  • the charge / discharge control unit 14 changes the set value of the charge completion SOC of the power storage unit 10 to a state suitable for the changed temperature environment.
  • the charge completion SOC of power storage unit 10 is changed to P%.
  • the charge / discharge control unit 14 turns on the switch 12 to turn on the connection between the auxiliary power storage unit 11 and the external connection terminal for charge / discharge (terminal connected to the charger 18).
  • charging / discharging is performed using the auxiliary power storage unit 11.
  • the SOC of the auxiliary power storage unit 11 is set to 100%. That is, when charging the electric power, the power storage unit 10 is charged with SOC up to P%, and the auxiliary power storage unit 11 is charged with SOC up to 100%.
  • the power is taken out from the power storage unit 10 and the auxiliary power storage unit 11.
  • a capacitor can be discharged in a shorter time than a lithium ion secondary battery, and is discharged from the auxiliary power storage unit 11 immediately after the start of discharge, and then discharged from the power storage unit 10. Can be considered.
  • a means of discharging from the power storage unit 10 immediately after the start of discharge and then discharging from the auxiliary power storage unit 11 is also conceivable.
  • charging / discharging is performed using only the power storage unit 10 composed of a lithium ion secondary battery. It will be discharged from.
  • second temperature range the operation immediately after the start of discharge is equivalent regardless of the temperature environment by discharging from the power storage unit 10 immediately after the start of discharge. It can be. As a result, it is possible to avoid the inconvenience that gives the user an uncomfortable feeling.
  • a means of taking electric power from both the power storage unit 10 and the auxiliary power storage unit 11 and discharging it can be considered.
  • the charge / discharge current value flowing through the power storage unit 10 can be reduced, and deterioration of the power storage unit 10 can be reduced.
  • the charge / discharge current path (I) also flows to the capacitor side (Ic). Can be made. Since the internal resistance (Rc) of a capacitor is generally lower than the internal resistance (Rb) of a lithium ion secondary battery, the shunt current (Ib) flowing through the lithium ion secondary battery is larger than the shunt current (Ic) flowing through the capacitor section. However, the shunt current (Ib) can be made smaller than the charge / discharge current path (I) (see the following formula).
  • the amount of current of the lithium ion battery unit (power storage unit 10) is reduced as compared with a system of a single lithium ion secondary battery having the same charge / discharge current value of the entire storage battery. be able to.
  • the SOC of the lithium ion secondary battery in a severe temperature environment can be reduced, and the SOH of the lithium ion battery can be greatly increased.
  • the temperature environment in which the storage battery can be used can be expanded, and the useful life of the entire system can be greatly increased.
  • significant operational cost savings are possible.
  • the present embodiment is an embodiment in which the storage battery 1 of the first embodiment is more specific.
  • FIG. 4 an example of a structure of the storage battery 1 of this embodiment is shown.
  • the storage battery 1 includes a power storage unit 10, an auxiliary power storage unit 11 (child auxiliary power storage units 11a and 11b), switches 12a and 12b, a temperature measurement unit 13, and a charge / discharge control unit (control circuit) 14.
  • the storage battery 1 is connected to a charger 18.
  • the power storage unit 10, the temperature measurement unit 13, the balance circuit 15, the switch 16, and the switch 17 are the same as those in the second embodiment.
  • the auxiliary power storage unit 11 has two rows of child auxiliary power storage units 11a and 11b.
  • Each of the child auxiliary power storage units 11a and 11b has a configuration in which a plurality of capacitor cells (such as electric double layer capacitor cells) are connected in series.
  • the plurality of child auxiliary power storage units 11a and 11b are connected in parallel to each other.
  • the plurality of child auxiliary power storage units 11 a and 11 b are also connected in parallel with the power storage unit 10.
  • the plurality of child auxiliary power storage units 11a and 11b are configured to be able to individually control the connection state with the external connection terminals for charging and discharging by controlling on / off of the switches 12a and 12b.
  • the energy density of each of the child auxiliary power storage units 11a and 11b is, for example, 10 Wh / kg or more.
  • the number of child auxiliary power storage units 11a and 11b may be three or more. Further, the configurations (battery types, cell connection methods, capacities, etc.) of the plurality of child auxiliary power storage units 11a, 11b may be the same or different.
  • the charge / discharge control unit 14 obtains the measurement result from the temperature measurement unit 13, changes the charge completion SOC of the power storage unit 10 according to the result, and turns on / off each of the switches 12a and 12b at the time of charge / discharge. Control.
  • the charge / discharge control unit 14 holds correspondence information as shown in FIG.
  • the correspondence information shown in the figure corresponds to the value of the charge completion SOC of the power storage unit 10 and the number of columns of the child auxiliary power storage units 11a and 11b that turn on the connection with the external connection terminal for charge / discharge for each predetermined temperature range. Information.
  • the charge / discharge control unit 14 When the charge / discharge control unit 14 acquires the measurement result from the temperature measurement unit 13, the charge / discharge control unit 14 refers to the correspondence information as illustrated in FIG. 5 and connects the charge completion SOC of the power storage unit 10 and the charge / discharge external connection terminal. The number of columns of the child auxiliary power storage units 11a and 11b to be turned on is determined. Then, on / off of each of the switches 12a and 12b is controlled so as to satisfy the determined number of columns.
  • the temperature measuring unit 13 includes a plurality of temperature sensors, the correspondence information can be searched using the representative value as a key. However, the representative value may be an average value or the worst value (the largest value). There may be.
  • the charge / discharge control unit 14 includes all the child auxiliary power storage units 11a and 11b.
  • the connection with the external connection terminal for charging / discharging is turned off, and charging / discharging is performed using only the power storage unit 10.
  • the SOC of the power storage unit 10 at this time is 100%.
  • the charge / discharge control unit 14 is arranged so that when the measurement result (temperature T) of the temperature measurement unit 13 is in the temperature range of ⁇ 20 ⁇ T ⁇ ⁇ 10 or 50 ⁇ T ⁇ 75, one row of child auxiliary power storage units 11a and the external connection terminal for charging / discharging are turned on, and charging / discharging is performed using the power storage unit 10 and the one row of child auxiliary power storage units 11a.
  • the charging completion SOC of the power storage unit 10 is 90%
  • the charging completion SOC of the child auxiliary power storage unit 11a is 100%.
  • the amount of power for 10% SOC of power storage unit 10 and the amount of power for 100% SOC of child auxiliary power storage unit 11a substantially coincide.
  • the charge / discharge control unit 14 and the two rows of child auxiliary power storage units 11a and 11b and the external charge / discharge unit The connection with the connection terminal is turned on, and charging / discharging is performed using the power storage unit 10 and the two rows of child auxiliary power storage units 11a and 11b.
  • the charging completion SOC of the power storage unit 10 is 80%, and the charging completion SOC of the child auxiliary power storage units 11a and 11b is 100%.
  • the amount of power for 10% SOC of power storage unit 10 and the amount of power for 100% SOC of child auxiliary power storage unit 11b substantially coincide.
  • the charge / discharge control unit 14 turns off the connection between the auxiliary power storage unit 11 (all child auxiliary power storage units 11a and 11b) and the external connection terminals for charge / discharge, Charge / discharge is performed using only the unit 10. Further, when the temperature is in the fourth temperature range, the connection between the child auxiliary power storage units 11a and 11b in the M row (M is an integer of 1 or more) and the external connection terminal for charging / discharging is turned on, and the power storage units 10 and M Charging / discharging is performed using the child auxiliary power storage units 11a and 11b in the row.
  • the connection between the child auxiliary power storage units 11a, 11b in N columns (N is an integer greater than M) and the external connection terminal for charging / discharging is turned on, and the power storage units 10 and N Charging / discharging is performed using the child auxiliary power storage units 11a and 11b in the row.
  • the charging completion SOC of power storage unit 10 when the temperature is in the third temperature range is higher than the charging completion SOC of power storage unit 10 when the temperature is in the fourth temperature range, and the temperature is fourth.
  • the charging completion SOC of the power storage unit 10 when the temperature is within the temperature range is greater than the charging completion SOC of the power storage unit 10 when the temperature is within the fifth temperature range.
  • the present embodiment it is possible to achieve the same operational effects as those of the first and second embodiments.
  • a control device having a charge / discharge control unit 14 may be provided in a manner that can be distinguished from the storage battery 1 having the power storage unit 10, the auxiliary power storage unit 11, and the temperature measurement unit 13. Good.
  • the control device may be attached to a predetermined position in the storage battery 1 and integrated with the storage battery 1.
  • Power storage means composed of one or more battery cells; An auxiliary power storage means composed of one or a plurality of battery cells and connected in parallel with the power storage means; Temperature measuring means for measuring the temperature; Charge / discharge control means for controlling charge / discharge of the power storage means and the auxiliary power storage means; Have The charge / discharge control means changes the SOC (state of charge) of the power storage means and the auxiliary power storage means in a charge completion state that does not allow further charging according to the measurement result by the temperature measurement means, and A storage battery in which the SOC of the auxiliary power storage means is increased when the SOC of the power storage means is decreased, and the SOC of the auxiliary power storage means is decreased when the SOC of the power storage means is increased.
  • the charge / discharge control means includes When the temperature is in the first temperature range, turn off the connection between the auxiliary power storage means and the external connection terminal for charging / discharging, and charge / discharge using only the power storage means, A storage battery that turns on the connection between the auxiliary power storage means and the external connection terminal for charge / discharge and charges and discharges using the power storage means and the auxiliary power storage means when the temperature is in the second temperature range. 3.
  • the auxiliary power storage means is a storage battery having a plurality of rows of secondary auxiliary power storage means connected in parallel to each other and individually configured to control the connection state with the external connection terminals for charging and discharging. 5.
  • the charge / discharge control means includes When the temperature is in the third temperature range, turn off the connection between the auxiliary power storage means and the external connection terminal for charging / discharging, and charge / discharge using only the power storage means, When the temperature is in the fourth temperature range, the connection between the child auxiliary power storage unit in the M row (M is an integer of 1 or more) and the external connection terminal for charge / discharge is turned on, and the power storage unit and the M row Charge and discharge using the child auxiliary power storage means, When the temperature is in the fifth temperature range, the connection between the child auxiliary power storage means in N columns (N is an integer greater than M) and the external connection terminal for charge / discharge is turned on, and the power storage means and the N columns A storage battery that charges and discharges using
  • the SOC of the power storage means when the temperature is in the third temperature range is greater than the SOC of the power storage means when the temperature is within the fourth temperature range
  • a storage battery in which the SOC of the electricity storage means when the temperature is in the fourth temperature range is greater than the SOC of the electricity storage means when the temperature is in the fifth temperature range . 7).
  • the charge / discharge control means is configured to turn on the connection between the charge completion state SOC value and the charge / discharge external connection terminal for each predetermined temperature range.
  • the storage means is a storage battery which is a lithium ion secondary battery.
  • the auxiliary power storage means is a storage battery composed of a capacitor. 10.
  • Power storage means composed of one or more battery cells;
  • An auxiliary power storage means composed of one or a plurality of battery cells and connected in parallel with the power storage means;
  • Temperature measuring means for measuring the temperature;
  • a storage battery control method in which the SOC of the auxiliary power storage means is increased, and the SOC of the auxiliary power storage means is reduced when increasing the SOC of the power storage means.
  • the auxiliary power storage means is a storage battery control method comprising a plurality of rows of secondary auxiliary power storage means that are connected in parallel to each other and individually configured to control the connection state with the external connection terminals for charging and discharging. 10-5.
  • the storage means is a storage battery control method which is a lithium ion secondary battery. 10-9.
  • the auxiliary power storage means is a storage battery control method including a capacitor.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

L'invention concerne une batterie de stockage (1) ayant : une unité de stockage d'électricité (10) ; une unité de stockage d'électricité auxiliaire (11) raccordée en parallèle avec l'unité de stockage d'électricité (10) ; une unité de mesure de température (13) pour mesurer la température ; et une unité de contrôle de charge et de décharge (14) pour contrôler la charge et la décharge de l'unité de stockage d'électricité (10) et de l'unité de stockage d'électricité auxiliaire (11). Dans la batterie de stockage (1), l'unité de contrôle de charge et de décharge (14) change, selon le résultat de la mesure par l'unité de mesure de température (13), les états de charge (états de charge d'achèvement de charge) de l'unité de stockage d'électricité (10) et de l'unité de stockage d'électricité auxiliaire (11) en un état d'achèvement de charge dans lequel plus aucune charge n'est autorisée. Lors de la diminution de l'état de charge d'achèvement de charge de l'unité de stockage d'électricité (10), l'unité de contrôle de charge et de décharge (14) augmente l'état de charge d'achèvement de charge de l'unité de stockage d'électricité auxiliaire (11). Lors de l'augmentation de l'état de charge d'achèvement de charge de l'unité de stockage d'électricité (10), l'unité de contrôle de charge et de décharge (14) diminue l'état de charge d'achèvement de charge de l'unité de stockage d'électricité auxiliaire (11).
PCT/JP2014/054701 2013-02-27 2014-02-26 Batterie de stockage, procédé de contrôle de batterie de stockage, dispositif de contrôle et procédé de contrôle WO2014133009A1 (fr)

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US14/770,514 US9774062B2 (en) 2013-02-27 2014-02-26 Storage battery, control method of storage battery, control device, and control method
JP2015502956A JP6041040B2 (ja) 2013-02-27 2014-02-26 蓄電池、蓄電池の制御方法、制御装置及び制御方法

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US10897147B2 (en) * 2015-11-16 2021-01-19 Molex, Llc Power charging module and temperature-based methods of using same
FR3060889B1 (fr) * 2016-12-21 2020-12-04 Commissariat Energie Atomique Procede et dispositif de charge d'une batterie
US11133680B2 (en) * 2019-01-08 2021-09-28 GM Global Technology Operations LLC Balancing system for rechargeable energy storage assembly with multiple parallel units
CN113541250B (zh) * 2021-07-14 2023-04-11 维沃移动通信有限公司 电池充电控制电路及电子设备

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